Hi there, My Windows 8 loads really slowly and behaves generally terribly. I have for ages checked the task manager and it often says things like 1.5MB/s - 100% Disk usage, which seems totally wrong... The task manager is another thing that's slow, if I ask for it, it takes about a minute to appear and if I use CTRL+SHIFT+ESC multiple times, when it decides to show itself it shows two copies of the task manager, one full mode and one the stripped down mode... I have tried to do the boot analysis as a beginning point to see what is going on and I get errors when I try to process the two ETL files that appear: Using cmd as an Admin, I get the following output when I try to process the files into XML: C:\temp>xperf /tti -i boot_BASE+CSWITCH+DRIVERS+POWER_1_km_premerge.etl -o summary_boot.xml -a boot[1/2] 100.0%[2/2] 100.0%Execute: boot [0x80004005]C:\temp>xperf /tti -i boot_BASE+CSWITCH+DRIVERS+POWER_1_um_premerge.etl -o summary_boot_um.xml -a boot[1/2] 100.0%[2/2][-] 0.1%warning: EventSink {08bf3547-4cf4-4f28-9ea7-95267fb97af6} signaled an Invalid Event: Event#: 726252 (T#0:#726252) TimeStamp: 341361587, Process: 2172, Thread: 3292, Cpu: 2 ProviderId: {30336ed4-e327-447c-9de0-51b652c86108} EventDescriptor: 0x2581 0x2581 0x01 0x00 0x10 0x04 0x8000000004010000 UserDataLength: 0[2/2] 100.0%Execute: boot [0x8000ffff]Then the generated XML files say: For "boot_BASE+CSWITCH+DRIVERS+POWER_1_km_premerge.etl", the XML file has the following error: "Boot action failed: Could not locate ExplorerReady event or mark.". For "boot_BASE+CSWITCH+DRIVERS+POWER_1_um_premerge.etl", the XML file has the following error: "Boot action failed: No disk IOs found.". Any help would be much appreciated, thanks. =)